Urinary Nephrocalcin Excretion in Children with Urolithiasis

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Abstract

The aim of this study was to investigate the role of nephrocalcin in childhood urolithiasis. Forty-one patients with urinary stones and 25 age- and sex-matched healthy controls were admitted to the study. Blood and timed urine samples were taken from both patient and control groups for biochemical analysis. Serum and urine creatinine (Cr) and urinary nephrocalcin (NC) were measured. NC excretion was expressed as a NC/Cr (mg/g) ratio. NC-PreA/Cr and NC-D/Cr ratios were found to be significantly higher in patients than in the control group. No statistically significant differences were found in NC-A/Cr, NC-B/Cr, NC-C/Cr ratios between the patient and control groups. The high NC-PreA/Cr ratio (p = 0.012) observed in stone-forming patients indicates that this ratio may also be an important stimulatory factor for urinary stone disease.

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Recurrent renal stone disease-advances in pathogenesis and clinical management.

Marc A. Meyers, G Bihl (2001)

Kidney stones are common in industrialised nations: up to 15% of white men and 6% of all women will develop one stone, with recurrence in about half these people. Risk factors for formation of stones include urinary promoters (calcium, urate, cystine, and sodium) and urinary inhibitors (magnesium, citrate, and nephrocalcin). Acute renal colic can be precipitated by dehydration and reduced urine output, increased protein intake, heavy physical exercise, and various medicines. Such colic manifests as severe loin pain and can be accompanied by frequent urination, dysuria, oliguria, and haematuria. Documentation of stone characteristics is extremely important: type, size, location, and underlying metabolic abnormalities. Such details can be obtained with a combination of biochemical investigations, microscopic examination of urine under polarised light, and an intravenous pyelogram. Ultrasonography and plain abdominal radiographs are also useful, especially for patients unable to tolerate an intravenous pyelogram. Acute therapy includes complete pain relief, rehydration, and encouragement of diuresis. Long-term management encompasses education of patients with regard to diet and fluid intake, control of calciuria, citrate replacement, and treatment of any underlying urinary-tract infection or metabolic abnormality. Stones smaller than 5 mm normally pass spontaneously, whereas larger stones, as big as 2 cm, are best treated with extracorporeal shock-wave lithotripsy. All physicians should have a clear understanding of the pathogenesis and clinical management (acute treatment and prevention of recurrence) of renal stone disease.

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Plasma cholesteryl ester transfer protein activity in hyper- and hypothyroidism

KC Tan, SW Shiu, AW Kung … (1998)

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Glycosaminoglycans, proteins, and stone formation: adult themes and child's play.

R Ryall (1996)

The relative infrequency of renal stones in children is probably the main reason for the paucity of literature devoted to the study of urolithiasis in pediatric patients. Nonetheless, when pediatricians do address the issue, the contents of their papers reflect those prevalent in the adult literature; with one notable exception. Papers dealing with the potential role of urinary macromolecules in pediatric stone disease are very scarce indeed; to my knowledge, only four have been published in the English literature in the last 15 years. One of these is to be found in this issue and, like the remaining three, it compares the urinary excretion of glycosaminoglycans in healthy children and those with stones. This article briefly reviews the history of the association of urinary macromolecules, particularly glycosaminoglycans and proteins, with calcium oxalate urolithiasis, and discusses in more detail the published experimental evidence for their fulfilling a determinant role in stone formation.

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Author and article information

Journal

Journal ID (publisher-id): NEP

Journal ID (nlm-ta): Nephron Physiol

Journal ID (doi): 10.1159/issn.1660-2137

Title: Nephron Physiology

Publisher: S. Karger AG

ISSN (Electronic): 1660-2137

Publication date Subscription-year: 2003

Publication date (Print): August 2003

Publication date (Electronic): 12 September 2003

Volume: 94

Issue: 4

Pages: p59-p61

Affiliations

Departments of ^aPediatric Nephrology and ^bUrology, Çukurova University, School of Medicine and ^cLaboratory of Başkent University, Adana Hospital, Adana, Turkey

Article

Publisher ID: 72518 Other ID: Nephron Physiol 2003;94:p59–p61

DOI: 10.1159/000072518

PubMed ID: 12972707

SO-VID: c0f9084c-d48e-4346-8198-453b3ed035c0

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Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

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Urinary Nephrocalcin Excretion in Children with Urolithiasis

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Karger: Nephrology

Most cited references 4

Recurrent renal stone disease-advances in pathogenesis and clinical management.

Plasma cholesteryl ester transfer protein activity in hyper- and hypothyroidism

Glycosaminoglycans, proteins, and stone formation: adult themes and child's play.

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